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Convert C# Program to Pascal

This C# program is designed to convert simple C# programs into Pascal language code. The program reads a C# source code file and translates basic constructs like if, for, while, variable declarations, and method definitions into their equivalent Pascal syntax. The translated code is written to an output file in Pascal format. This is a useful tool for developers who need to port simple C# programs to Pascal or study the differences between the two programming languages.



Group

File Handling in C#

Objective

1. Provide a C# source code file as input.
2. The program parses the C# code and identifies basic constructs like loops, conditionals, and method definitions.
3. It converts the identified constructs into Pascal syntax.
4. The translated Pascal code is saved to a new output file.

Example usage: 

convertToPascal inputFile.cs outputFile.pas


Create a program that converts simple C# programs, such as the following one, to the Pascal language.

Example C# Exercise

 Copy C# Code 
using System;
using System.IO;

class CSharpToPascalConverter
{
    // Main method where the program starts execution
    static void Main(string[] args)
    {
        // Check if the user provided the input and output filenames as command line arguments
        if (args.Length != 2)
        {
            Console.WriteLine("Usage: convertToPascal  ");
            return;
        }

        // Get the input and output file paths from the command line arguments
        string inputFile = args[0];
        string outputFile = args[1];

        try
        {
            // Open the input C# file for reading
            string csharpCode = File.ReadAllText(inputFile);

            // Convert C# code to Pascal syntax
            string pascalCode = ConvertCSharpToPascal(csharpCode);

            // Write the Pascal code to the output file
            File.WriteAllText(outputFile, pascalCode);

            Console.WriteLine("C# code has been converted to Pascal and saved to " + outputFile);
        }
        catch (Exception ex)
        {
            // If there was an error, display the error message
            Console.WriteLine($"Error: {ex.Message}");
        }
    }

    // Method to convert C# code to Pascal code
    static string ConvertCSharpToPascal(string csharpCode)
    {
        // Convert common C# constructs to Pascal syntax
        csharpCode = csharpCode.Replace("public class", "program");
        csharpCode = csharpCode.Replace("static void Main", "begin");
        csharpCode = csharpCode.Replace("Console.WriteLine", "writeln");
        csharpCode = csharpCode.Replace("Console.ReadLine", "readln");
        csharpCode = csharpCode.Replace("{", "begin");
        csharpCode = csharpCode.Replace("}", "end.");
        csharpCode = csharpCode.Replace("int", "integer");
        csharpCode = csharpCode.Replace("string", "string");

        // Convert for loops
        csharpCode = csharpCode.Replace("for (int i =", "for i :=");
        csharpCode = csharpCode.Replace("i < ", "i <= ");
        csharpCode = csharpCode.Replace("i++)", "do");
        csharpCode = csharpCode.Replace("}", "end");

        // Convert if statements
        csharpCode = csharpCode.Replace("if (", "if ");
        csharpCode = csharpCode.Replace("else", "else");

        // Return the converted Pascal code
        return csharpCode;
    }
}

 Output

//Case 1 - Successful Conversion:

//For the command:
convertToPascal inputFile.cs outputFile.pas

//Output:
C# code has been converted to Pascal and saved to outputFile.pas

//Case 2 - Error (File Not Found):

//For the command:
convertToPascal nonExistentFile.cs outputFile.pas

//Output:
Error: The system cannot find the file specified.

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